Hi,
I'm using snappyHexMesh on .stl files with multiples inlets/outlets and the feature edges snaping gives usually good results to resolve they shape. However I sometimes end with meshes likes that:
My snappyHexMeshDict is :http://pastebin.com/ZAJrzCRP

I tried playing with the different snapping option especially the tolerance, without great success.

Hi !
Thank you for the reply.
Took me some time but I finally managed to get a good looking mesh : I used the implicitFeatureSnap instead of explicit, increased the number of cells and reduced the snapping iterations.
Regards.